As if that weren't enough, the K21 Auto-Dimming Rear View Mirror comes with a self-calibrating digital display compass. The mirror even has an exterior thermometer that displays temps and ice warnings.

The windshield-mounted mirror comes complete with detailed installation instructions and all necessary hardware - perfect for the experienced do-it-yourselfer or professional installer with some wiring required. And, the Auto-Dimming Rear View Mirror comes with 3-year / 36, 000 mile warranty. See what a difference the K21 Auto-Dimming Rear View Mirror can make.

Notes

The Gentex Wire Cover is highly recommended if there is 3" or more space between your mirror and the headliner. It conceals otherwise loose and visible wires running to the mirror. Select this part under "optional accessories" above.

Everything very well until we had to find a hot wire running to the switch. Finally found it at the cigarette lighter, had to extend the the wire from the mirror to reach the lighter, could have run the wire down the b-post instead but already had everything wire tied.
Went very well

I missed the compass and temp display in my new Ford Transit Connect. I checked with the dealer and the mirror from them was a bit under $400. Did a bit of research and found that this is EXACTLY the same mirror and is way less $$. After less than a hour, it is installed and functioning perfectly.